At Onterris, we build careers grounded in purpose, responsibility and real-world impact.
“For Planet and Progress” is our north star that guides everything we do. We believe environmental responsibility and human progress are interconnected, interwoven and international. Our scientists, engineers, field teams, consultants and professionals collaborate across disciplines and geographies, guiding industries and governments, ensuring that communities and environments thrive.
When you join us, you’re not just forging a career, you’re joining a movement. A movement for better thinking, smarter solutions and lasting impact.
Together, we will advance our way of life and protect the integrity of our environment every step of the way.
A Day in the Life
As a Project Accounting Analyst, you’ll be supporting accurate, timely billing and strong collaboration relationships while partnering closely with Project Managers (PMs) to ensure operational and financial alignment. The ideal candidate will have a strong understanding of billing processes, excellent communication skills, and the ability to thrive in a fast-paced environment. As a key member of the Finance Center of Excellence, this role will be responsible for a full range of activities.
The annual salary range for this role is between $55K to $65K, commensurate with experience, skills, and geographic location (Little Rock, Arkansas).
To thrive in this role, you’ll be comfortable taking ownership of the following responsibilities:
Invoice Processing Prepare and issue accurate, timely invoices based on project data, purchase orders, contracts, and service agreements, in alignment with company policies and customer requirements.
Partner with PMs Collaborate regularly with Project Managers to ensure billable work is captured accurately, WIP is maintained at appropriate levels, and billing milestones are met.
Data Entry & Validation Accurately input and verify billing data in the ERP/accounting system, including quantities, pricing, tax codes, and customer details.
Discrepancy Resolution Identify and investigate discrepancies between billing inputs and contract terms; coordinate with internal teams (PMs, Contracts, Finance) to resolve billing issues promptly.
Ad Hoc Entries & Reconciliations Prepare and post ad hoc journal entries, billing adjustments, and reconciliations to ensure accurate project and customer account balances.
Customer Support Respond professionally to internal stakeholders or customer inquiries related to invoices, providing clear, timely information to resolve questions and support strong client relationships.
Accounts Receivable Collaboration Monitor aging reports, follow up on outstanding balances, and partner with the AR team to support prompt collections and issue resolution.
Reporting & Analysis Generate and distribute regular and ad-hoc reports on invoicing activity, project billing status, and outstanding balances.
To succeed in this role, individuals must be able to effectively perform each essential duty and responsibility. The qualifications outlined below represent the knowledge, skills, and abilities required for successful performance.
Your Expertise and Skills
These requirements reflect the knowledge, skills and abilities that help you do your best work here.
Bachelor’s degree in accounting, finance, business administration
1 – 3 years of experience in project-based billing, preferably in consulting, engineering, or environmental services
Knowledge of standard accounting concepts, practices and procedures, and be able to apply these on a daily basis to ensure accurate and detailed reports for assigned responsibilities.
Strong working knowledge of ERP systems (e.g., Workday, Oracle, SAP) with a strong desire to learn the ins and outs of Workday and a willingness to explore its functionalities
Proficient in Microsoft Office Suite, particularly Excel
High attention to detail and a commitment to accuracy
Analytical mindset with strong problem-solving abilities and attention to detail
Proven ability to communicate effectively across departments and with external clients
Ability to prioritize and manage multiple tasks in a deadline-driven environment
Work Environment and Physical Requirements
The physical and environmental requirements below reflect what’s typically needed to perform the essential functions of this role safely and effectively. We may provide reasonable accommodations for qualified individuals with disabilities, consistent with applicable law, to support performance of the essential functions.
Sitting, standing, and walking
Infrequently lifting to 25 pounds
Infrequent overhead lifting to 10 pounds
Bending, climbing and stooping
Long hours involving overtime and weekends (infrequently)
Keyboarding/typing
Ability to read effectively from a computer screen and/or a paper copy
Ability to handle a large volume of work and perform multiple tasks in a fast-paced environment
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Onterris is a leading global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect. Guided by our mission to advance the way of life without compromising the integrity of our environment, we believe environmental responsibility and human progress are fundamentally connected. Our scientists, engineers, field teams and consultants apply systems thinking that unites science, data and practical expertise to deliver solutions that strengthen our clients’ resilience, mitigate risk and protect the air, water and soil that sustain communities, while uncovering responsible paths forward for planet and progress. For more information, visit www.onterris.com
We are an equal opportunity employer and encourage applications from people of all backgrounds. We acknowledge that these experiences and perspectives help to enrich our teams and contribute to our ongoing success. We are committed to providing access and reasonable accommodation in our employment for all applicants. For US residents, click here to learn more.
Montrose Environmental was one of the first to see environmental responsibility as not just an imperative but as a strategic asset. And we’re well ahead of the curve in applying the latest technologies in practical ways to solve difficult environmental challenges.
How? By building a leadership team with exceptional depth of experience and breadth of expertise. By bringing together a wealth of local knowledge that allows us to address homegrown issues across multiple locations. By removing operational roadblocks that stand in the way of streamlined, hassle-free, nation-spanning implementation. And by investing in assets and technologies that will keep us out in front of emerging environmental concerns for years to come.
In short, we approach our job the same way our clients approach theirs: With a sense of urgency, a commitment to adding value, and a stubborn refusal to settle for second-best. All to help the people we partner with identify and seize opportunity.
